银杏雄株无性系枝丫材横切面解剖特性

对莱州小草沟园艺场15个银杏雄株无性系枝丫材的应压木和对应木进行解剖分析。结果表明：银杏雄株无性系间应压木及对应木管胞的双壁厚、壁腔比、径向直径和弦向直径的差异均达极显著水平；38“木材的双壁厚、壁腔比、径向直径、弦向直径分别为8．66μm、0．34、22．54μm、24．12μm，综合质量最高，其次是91#和006#；009#综合质量最差，各指标数值分别为5．61μm、0．32、17．93μm、22．93μm。

Anatomical Characteristics of Cross Section from Crotch Wood of Ginkgo biloba Male Clones

The anatomical analyses were carried out on the compression wood and opposite wood of 15 male clone tree crotches of Ginkgo biloba grown in Xiaoeaogou Hortieuhure Farm of Laizhou Municipality, Shandong Province. The results obtained were as follows： there were extremely significant differences among the traeheid double wall thickness, ratio of wall to cavity, radial diameter and ehordwise diameter of both compression wood and opposite wood. The best comprehensive quality wood was sample 38#, whose double wall thickness, ratio of wall to cavity, radial diameter and ehordwise diameter was 8.66μm, 0.34, 22.54μm and 24.12μm, respectively; the comprehensive quality of sample 91#, 006# took the second place. The poorest comprehensive quality wood was that of sample 009#, and each index value was 5.61μm, 0.32, 17.93μm, 22.93μm correspondingly.